RML480Z PSU

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danielj
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RML480Z PSU

Post by danielj » Sun Nov 10, 2019 2:36 pm

I got a 480Z! Yey!
The Video RAM was screwy, that's been replaced, working fine, then PSU has gone pop :( negligible voltages on all 3 outputs and slight hiss/buzz from inside the PSU. Normally it's 5V/12V/-12V...

I really have no experience with sorting out a PSU and no idea how they really work. The circuit diagram is on pg 101 of this document https://vt100.net/rm/docs/pn13821b.pdf

Is anyone able to give me some pointers in the right direction please? [-o<

d.

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